VSSC FRP Technician Paper 2019

Vikram Sarabhai Space Centre FRP Technician Paper 2019

Bullet resistant vests mainly use the following fiber
(a) Boron
(b) Glass
(c) Graphite
(d) Kevlar

The definition of strain is
(a) Final length divided by the initial length
(b) Load divided by Area
(c) The change in length divided by the final length
(d) The change in length divided by the initial length

Usually weaker constituent of a composite is
(a) Matrix
(b) Reinforcement
(c) Both (a) & (b) are of equal strenth
(d) Can’t define

Motor cases are manufactured in aerospace industries by
(a) Injection moulding
(b) Pressure bag moulding
(c) Filament winding
(d) Autoclave moulding

Which of the following construction is difficult to fabricate
(a) Monocoque
(b) Hat-Stiffened
(c) Blade-Stiffened
(d) Filament wound

Flexural strength is obtained in
(a) Tension Test
(b) Compression Test
(c) Three point bending test
(d) Rail shear test

Which material has minimum density?
(a) Carbon/ Epoxy composites
(b) Kevlar/ Epoxy composites
(c) Glass/ Epoxy composites
(d) Titanium alloy

The most widely used composites are
(a) bismaleimides
(b) fiber-reinforced thermoplatic polymers
(c) fiber-reinforced thermosetting polymers
(d) phenolics

The mechanical properties of composites are significantly increased with the use of reinforcement material that consists of
(a) finely ground particles
(b) long oriented fibers
(c) random chopped fiberglass material
(d) graphite flakes

Which of the following is a cleaning agent used for composites?
(a) Acetone
(b) Iso-propyl alcohol
(c) Tri-chloro ethylene
(d) All of the above